
const month = [
    "Jan", "Feb", "Mar", "Apr",
    "May", "June", "July", "Aug",
    "Sep", "Oct", "Nov", "Dec"] ;
  
  let d = new Date();
  
  function date() {
    //var d = new Date() ;
    document.getElementById("t").innerHTML = d.getDate() + " / " + month[d.getMonth()] + " / " + d.getFullYear();
    loadStorage('msg') ;
  }
  
  function home_page() {
    window.history.back(-1);
  }
  
  function saveStorage(id) {
    //获取textarea的value值
    var data = document.getElementById(id).value;
    if(data=="")
      return ;
    //获取当前时间戳
    var time = new Date().getTime();
    //将时间戳作为键值，textarea的value值作为键值的内容保存在本地数据库
    localStorage.setItem(time,data);
    //保存成功后提示成功
    console.log("数据已保存");
    //设置loadStorage函数的传参（ID值）
    loadStorage('msg');
    document.getElementById(id).value = "";
  }
  
  function loadStorage(id) {
    var result = '<p>';
    //遍历本地数据所有内容
    for(var i = 0; i <localStorage.length; i++) {
        //获取每一条新增的键值
        var kes = localStorage.key(i);
        //console.log(kes) ;
        //获取新增键值的内容
        var value = localStorage.getItem(kes);
        //获取时间对象
        var date = new Date();
        date.setTime(kes);
        var time = date.getHours() + ":" + date.getMinutes() + "   " + month[date.getMonth()] + "/" + date.getDate();
  
        //将所有新增内容添加到result变量中
        result += "“" + value + "”"  + '</br>' + time + '</br>' + '</br>'
    }
    result += '</p>';
    var target = document.getElementById(id);
    //将所有内容添加到元素中显示
    target.innerHTML = result;
  
  }
  
  function clearStorage() {
    localStorage.clear();  
    document.getElementById('msg').value = "";
    loadStorage('msg') ;
    console.log("清除完毕");
  }
  
  function clearText(id) {
    document.getElementById(id).value = "";
  }
  
  